Charge
keyboard_arrow_right
Subsea energy storage
Subsea energy storage
Scroll to discover
- Halo: energy storage on the seabed
- Reliable and uninterrupted power to subsea assets
- State-of-the-art Lithium ion battery technology
- Gravity foundation
- Simple to install and recover
- Stable and secure in operation
- Restore power to wells with electrical supply problems
- Peak power delivery from a local energy source
- Enable all-electric and umbilical-less subsea developments
- Power out: high quality power supply to subsea assets
- Power in: flexibile in-situ charge capability
- Integrated remote communications
- Additional instrumentation options
- Impact and dropped object protection
- Fishing friendly structure options
- Modular battery architecture
- Scalable energy storage capacity
- AC or DC power output, customisable for the application
- Intelligent energy management and power delivery
- Multi-layered integrated protection systems
- Robust mechanical design
- Cost-effective remedy for umbilical failure
- Designed for marine renewable energy integration
- Emission free tie-backs and clean energy systems
Overview
Our scalable, modular energy storage system is specially developed for the demanding subsea environment. Using lithium-ion battery technology, Halo provides a reliable, uninterrupted power supply to subsea infrastructure as a temporary, permanent or back-up solution.
A smart solution
Halo is an alternative to umbilical cables, which are prone to failure with age. It’s an easily installable, autonomous power source solution that stands the test of time.
Key features
Fully rechargeable, Halo can be integrated with marine renewable energy converters – including our advanced technology, Powerhub – offering low carbon energy systems for subsea infrastructure. Here’s the need-to-know information:
- State-of-the-art lithium-ion battery technology maximises energy density and operating efficiency.
- Energy capacity and power output are scalable and configurable to suit your needs (100kWh, 250kWh and 500kWh standard capacities available on fast turnaround for emergency power applications).
- Charge in-situ using remote power generation or low-specification umbilical from topside or shore.
- Electrical accumulation provides peak power on demand, allowing power supply and distribution derating.
- Offered as standalone or can be integrated to other subsea equipment, like XT or Manifold.
Halo Applications
-
01. Brownfield
Halo offers an alternative to electrical cables, which are expensive to install and often need repaired or replaced over time. It’s quick to setup, too. And with it, you’ll get a fixed capacity energy supply – plus a range of charge options beyond that, including:
- Recharge on the seabed, using downline from surface vessel.
- Hot swap with fully recharged replacement unit.
- Supplement installed capacity with marine renewable energy converter, such as Powerhub.
-
02. Greenfield
With clean energy solutions, we can reduce the industry’s carbon footprint. Halo uses a modular battery system, designed specifically for powering subsea oil and gas assets. That means it can be implemented into greenfield developments in several ways:
- Energy storage for renewable energy integration, powering subsea assets with marine renewable converters and generating electricity on demand.
- Supplement power supplies by providing an energy source for subsea system peak demands, letting the power distribution system be sized on average demand rather than peak system loads – that means cutting costs, too.
- Can be located centrally within a drill centre or distributed among the subsea wells.
- Designed to be input / output agnostic, meaning we can easily scale the system to various energy capacities, accept charge from a wide range of sources, and adapt the output condition to suit the application.
-
03. Remote monitoring
By using a remote power source to monitor subsea wells, you can strip out all other infrastructure leaving just the wellhead and environmental barriers. That means the operator can defer plug and abandonment activities until several assets can be combined in a single campaign – saving time and money. Halo can be used for:
- Subsea data processing
- Powering sensors
- Subsea internet of things
- Decommissioning
- Aquaculture
-
04. ROV/AUV charging
New autonomous underwater vehicles (AUVs) are becoming more commercially available as an alternative to remotely operated vehicles (ROVs). They reduce the reliance on surface vessels, cutting out high costs and fuel dependency, by removing the tether between the vehicle and the surface. But the availability of power can be a challenge over extended periods of residency. That’s where Halo comes in.
Its system is perfect for integration within a subsea garage. Being a modular system, energy capacities of several hundred kWh can be deployed – providing multiple charge cycles for the vehicle and for subsea data processing / transmission to surface. Its variable charge interface also gives the AUV provider a range of options for very long-term deployments, by integrating a power source into the assembly.
It can be configured to buffer the power supply and act as an accumulator, providing a clean and stable power supply for fast charging – much quicker than what’s available directly from the renewable power source.